Reply #32: It's been around since the first century. [View All]

[rug]

It was formally codified by the twelfth century.

"In the "Decretum" of the Gratian who compiled the edicts of previous councils and the principles of Church law which he published about 1151, we find (secunda pars, dist. VI, c. II) the following declaration of the law as to the seal of confession:

"Deponatur sacerdos qui peccata p nitentis publicare præsumit", i.e., "Let the priest who dares to make known the sins of his penitent be deposed", and he goes on to say that the violator of this law should be made a life-long, ignominious wanderer.

"Canon 21 of the Fourth Lateran Council (1215), binding on the whole Church, lays down the obligation of secrecy in the following words: "Let the priest absolutely beware that he does not by word or sign or by any manner whatever in any way betray the sinner: but if he should happen to need wiser counsel let him cautiously seek the same without any mention of person. For whoever shall dare to reveal a sin disclosed to him in the tribunal of penance we decree that he shall be not only deposed from the priestly office but that he shall also be sent into the confinement of a monastery to do perpetual penance" (see Hefele-Leclercq, "Hist. des Conciles" at the year 1215; also Mansi or Harduin, "Coll. conciliorum").

"It is to be noted that neither this canon nor the law of the "Decretum" purports to enact for the first time the secrecy of confession. In a context cited further on the great fifteenth-century English canonist, Lyndwood, speaks of two reasons why a priest is bound to keep secret a confession, the first being on account of the sacrament because it is almost (quasi) of the essence of the sacrament to keep secret the confession. (Cf. also Jos. Mascardus, "De probationibus", Frankfort, 1703, arg. 378.)"

http://www.newadvent.org/cathen/13649b.htm